Zero no Tsukaima : Maigo no Shuushifu to Ikusen no Koukyoukyoku

About

Louise and her friends are taken to a big library. It seems some ghosts often appear these days and they are asked to examine it. However, while they do examination, Louise suddenly disappears. She comes back a while later, but she becomes just a shy girl without heart.... They need to go into books and collect fragments of her broken heart, according to the caretaker. Like this, they decide to enter the book world.

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